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1. Evolution of Radiation Belt Electron Pitch Angle Distribution Due to Combined Scattering by Plasmaspheric Hiss and Magnetosonic Waves

   https://doi.org/10.1029/2018GL081828  

   Hua, Man ; Ni, Binbin ; Li, Wen ; Gu, Xudong ; Fu, Song ; Shi, Run ; Xiang, Zheng ; Cao, Xing ; Zhang, Wenxun ; Guo, Yingjie ( March 2019 , Geophysical Research Letters)

   Both magnetosonic (MS) waves and plasmaspheric hiss can resonantly scatter outer radiation belt electrons, leading to various electron pitch angle distribution. Based on electron diffusion coefficients calculations and 2‐D Fokker‐Planck diffusion simulations, we perform a parametric study to quantitatively investigate the net electron scattering effect and the relative contributions of simultaneously occurring hiss and MS waves with groups of different wave amplitude combinations. It is found that the combined scattering effects are dominated by pitch angle scattering due to hiss emissions atL = 4, when their amplitude is comparable to or stronger than that of MS waves, thereby producing the butterfly, top‐hat, flat‐top, and pancake pitch angle distributions, while the butterfly distributions can evolve over a broader energy range when MS waves join the combined scattering effects. Our results demonstrate that the relative intensities of various plasma waves play an essential role in controlling the radiation belt electron dynamics.

    

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2. Lifetimes of Relativistic Electrons as Determined From Plasmaspheric Hiss Scattering Rates Statistics: Effects of ω pe /Ω ce and Wave Frequency Dependence on Geomagnetic Activity

   https://doi.org/10.1029/2020GL088052  

   Agapitov, O. ; Mourenas, D. ; Artemyev, A. ; Claudepierre, S. G. ; Hospodarsky, G. ; Bonnell, J. W. ( July 2020 , Geophysical Research Letters)

   null (Ed.)
3. Quantification of Energetic Electron Precipitation Driven by Plume Whistler Mode Waves, Plasmaspheric Hiss, and Exohiss

   https://doi.org/10.1029/2019GL082095  

   Li, W. ; Shen, X.‐C. ; Ma, Q. ; Capannolo, L. ; Shi, R. ; Redmon, R. J. ; Rodriguez, J. V. ; Reeves, G. D. ; Kletzing, C. A. ; Kurth, W. S. ; et al ( April 2019 , Geophysical Research Letters)
4. Global Survey of Electron Precipitation due to Hiss Waves in the Earth’s Plasmasphere and Plumes

   https://doi.org/10.1029/2021JA029644  

   Ma, Q. ; Li, W. ; Zhang, X. ‐J. ; Bortnik, J. ; Shen, X. ‐C. ; Connor, H. K. ; Boyd, A. J. ; Kurth, W. S. ; Hospodarsky, G. B. ; Claudepierre, S. G. ; et al ( August 2021 , Journal of Geophysical Research: Space Physics)

   We present a global survey of energetic electron precipitation from the equatorial magnetosphere due to hiss waves in the plasmasphere and plumes. Using Van Allen Probes measurements, we calculate the pitch angle diffusion coefficients at the bounce loss cone, and evaluate the energy spectrum of precipitating electron flux. Our ∼6.5‐year survey shows that, during disturbed times, hiss inside the plasmasphere primarily causes the electron precipitation atL > 4 over 8 h < MLT < 18 h, and hiss waves in plumes cause the precipitation atL > 5 over 8 h < MLT < 14 h andL > 4 over 14 h < MLT < 20 h. The precipitating energy flux increases with increasing geomagnetic activity, and is typically higher in the plasmaspheric plume than the plasmasphere. The characteristic energy of precipitation increases from ∼20 keV atL = 6–∼100 keV atL = 3, potentially causing the loss of electrons at several hundred keV.

    

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5. Hiss or equatorial noise? Ambiguities in analyzing suprathermal ion plasma wave resonance: HISS OR NOISE?

   https://doi.org/10.1002/2016JA022975  

   Sarno-Smith, Lois K. ; Liemohn, Michael W. ; Skoug, Ruth M. ; Santolik, Ondrej ; Morley, Steven K. ; Breneman, Aaron ; Larsen, Brian A. ; Reeves, Geoff ; Wygant, John R. ; Hospodarsky, George ; et al ( October 2016 , Journal of Geophysical Research: Space Physics)